The Deputy Flag Officer-in-Command, or DFOIC is the second highest position of authority, or the second-in-command, of a major Starfleet field division such as a Federation fleet, next to the Flag Officer-in-Command.
The Deputy Flag Officer-in-Command, or DFOIC is the second highest position of authority, or the second-in-command, of a major Starfleet field division such as a Federation fleet, next to the Flag Officer-in-Command.